Finding the Fourth Proportional to 3,607.18, 5,411.42 and 1,108.31

Step by Step Solution

1. Step 1: Write the proportion equation
   3,607.18 : 5,411.42 = 1,108.31 : x
2. Step 2: Convert to fraction form
   3,607.18/5,411.42 = 1,108.31/x
3. Step 3: Cross multiply
   3,607.18x = 5,411.42 × 1,108.31
4. Step 4: Simplify right side
   3,607.18x = 5,997,530.90
5. Step 5: Solve for x
   x = 5,997,530.90/3,607.18
6. Step 6: Final answer
   x = 1,662.66